Your solenoid is behind the white switch. The item with the large electrical cable that goes to the hydraulic pump. It is used to allow a large electrical surge to the pump, just like in your car, the solenoid is inline from the battery to the starter which has a large electrical draw for a short period as well. It stands to reason that the white switch to the front of the solenoid is the one your looking for.
Like was previously mentioned, you should be able to hook an electric drill to the front of the pump (after disconnecting the electrical from the pump) and run it counter-clockwise to manually bring up the levelers.
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